The system administrator has disabled your account?
I am completely new to linux and I have a couple of questions.
I installed my ubuntu and chose "matej" as username then I upgraded to version 8.04 (at least I think it's 8.04). Then I wanted to add a system user, so I went into the terminal and wrote the command adduser --system andrej. I changed andrej's password and then tried to log on to his account but it said The system administrator has disabled your account (or something like that). I went back to the terminal, wrote sudo su and my password to become root, and tried the command users-admin. It took me to user management but I couldn't change the settings of any user except matej.
a) How can I enable the account andrej?
b) How can I make it so that the andrej user will be able to become root with his password as well?
c) Why can't I edit other accounts with the users-admin command even if I'm root?